So we must find a logical calculation method and design model for shallow square boxes in order to guarantee the forming quality and improve the economic performance.
因此，我们必须寻找一种合理的低盒形件毛坯外形计算和设计方法，来保证板料的成形质量，从而提高经济效益。
Quantitative analysis of time performance is key to guarantee the validity of business process model and to improve its quality.
时间性能的定量分析是保证流程模型有效性和提高业务流程质量的关键。
Because these uncertainties existence, in fact, optimum control which obtained according to the ideal model not only can't guarantee optimum, but also cause the control quality to descend seriously.
由于这些不确定性的存在，按照理想模型得到的最优控制在实际上不仅不能保证最优，而且会引起控制品质的严重下降。
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